<template>
  <view>
    <!-- 使用自定义的搜索组件 -->
    <!-- <my-search :bgcolor="'#000000'" :radius="3"></my-search> -->
    <my-search @click="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧的滑动区域-->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      <!-- 右侧的滑动区域 -->
      <scroll-view scroll-y="true" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <!-- 二级分类标题 -->
          <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
          <!-- 动态渲染三级分类列表数据 -->
          <view class="cate-lv3-list">
            <!-- 三级分类的item项-->
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
              <!-- 三级分类的图片 -->
              <image :src="item3.cat_icon.replace('dev','web')"></image>
              <!-- 三级分类的文本 -->
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from "@/mixins/tabbar-badge.js"
  export default {
    mixins:[badgeMix],
    data() {
      return {
        // 当前设备可用的高度
        wh:0,
        // 分类列表数据
        cateList:[],
        active:0,
        //二级分类的列表
        cateLevel2:[],
        scrollTop:0
      };
    },
    onLoad(){
      const sysInfo = uni.getSystemInfoSync()
      // console.log(sysInfo)
      this.wh = sysInfo.windowHeight - 50,
      this.getCateList()
    },
    methods:{
      // 获取分类列表数据
      async getCateList(){
        const {data:res} = await uni.$http.get('/api/public/v1/categories')
        if(res.meta.status !==200) return uni.$showMsg()
        this.cateList = res.message
        // 二级分类赋值
        this.cateLevel2 = res.message[0].children
      },
      activeChanged(i){
        this.active = i
        // 重新为二级分类赋值
        this.cateLevel2 = this.cateList[i].children
        this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },
      // 跳转到商品列表页面
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
  .scroll-view-container{
    display:flex;
    background-color: #ffffff;
    
    .left-scroll-view{
      width:120px;
      
      .left-scroll-view-item{
        background-color: #f7f7f7; 
        line-height: 60px;
        text-align: center;
        font-size: 12px;
        
        &.active{
          background-color: #ffffff;
          position: relative;
          
          &::before{
            content:' ';
            display:block;
            width:3px;
            height:30px;
            background-color: #c00000;
            position:absolute;
            top:50%;
            left:0;
            transform: translateY(-50%);
          }
        }
      }
    }
  }
  
  .cate-lv2-title{
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding:15px 0;
  }
  
  .cate-lv3-list{
    display: flex;
    flex-wrap: wrap;
    
    .cate-lv3-item{
      width:33.33%;
      display: flex;
      flex-direction: column;
      justify-content:center ;
      align-items:center;
      margin-bottom:10px;
            
      image{
        width:60px;
        height:60px;
      }
      tetx{
        font-size: 12px;
      }
    }
  }
</style>
